Ok I got it to recognize the iPhone and tmobile then all of a sudden it said no sim. Is there any fix for this so that I don't lose service??? This will suck if I can't use it whenever without losing service??

yep. some afternoons my service keep dropping and reconnecting. so i just use the SBSetting to turn on the airplane mod and use the wifi for a few hours. i don't know what it is about my area or just my house but it's the way it is for me at my area.

but once your phone is pretty solid dont' do any major changes. only a little a time. like i said 3.0 is perfect for me so i'll skip 3.01 and 3.1 (from what i hearing) until i "need" the update

oh ya the @tmobile_usa twitter post every other day of 3g roll outs so maybe there playing around with the towards in your area? who knows.

oh check cydia for it. and i'm sorry the SBSetting let you quickly turn on wi-fi, rotation, brightness, etc. it does not restore you phone. sorry about that.

naw don't downgrade. i hear it's a pain. but i'm just sharing my experiences with my iphone. the other day it was not working and i wanted to toss it out the car. the GPS and EDGE would not load maps for me!! but others here probably have 2 or 3 Iphones with more experience and could give you a better answer or solution.

also check out the normal forum for unlocking and what not. the iphone modding area. iPhone Modding

3.01 is essentially 3.0 but with an SMS patch. Are you able to make a phone call when it says no sim? I know there is an issue where it will not say t-mobile but there will be signal. I dare say something did not take and you may have to try reinstalling 3.0.1 again but there is no big difference with 3.0 and 3.01. Now 3.1 there is a world of difference they are still working on those issues too. I personalty am sticking to 3.01 even with me being on a 2G All i know is it works fine and 3.1 didn't seem like a big deal to me anyway.

Someone asked earlier but i didn't see an answer. Have you tried another sim chip? tmobile or ATnT or both? Maybe friends or fam or anyone who would be willing to swap the chip for a few moments to test it. Have you used any other firmware before and it worked fine or is this a new phone? OR is this a new phone to you? did you buy it 2nd hand/3rd hand?? COULD be hardware related. Either the sim chip or the phone, heck even a bit of dirt could do it on the sim or inside the phone where the sim goes.

I have tmobile on my 3g iPhone. I ordered a turbo sim card and inserted it along with my tmobile sim. With the turbo u don't need 3g. Also had to tweak my tmo plan and add a data plan (I originally had a sidekick) to have full service. Now I do occasionally experience the " no sim" MSG but it's usually if I run into a dead zone, am underground, etc. I just switch to airport mode and switch back instead of resetting the phone. Also try internet2.voicestream.com as ur apn. With tmobile you have to talk to a rep from "tier 3" LOL good luck